Modular Armorers Stand(TM) Secure your Glock for easy cleaning, maintenance and display. ERGO's all new MAST is one of the most useful maintenance accessories available for Glocks. Simply bolt, clamp, or slide into the base to securely attach it to a bench and slide your Glock onto the block. Perfect for displaying, cleaning, maintenance, or storage. FITS: Small Module fits Glocks: 17, 17L, 19, 22, 23, 24, 26, 27, 31, 32, 33, 34, 35 Large Module fits Glocks: 20, 21, 29, 30, 40, 41 Part# Description 5000 MAST Module for small frame Glocks (fits 9mm/40cal) 5001 MAST Modulefor large frame Glocks (fits 10mm/45cal) 5002 MAST System Base 5003 MAST System for small frame Glocks (fits 9mm/40cal) WITH Base 5004 MAST System for large frame Glocks (fits 10mm/45cal) WITH Base 5005 MAST System for Glocks Complete Package: Small & large frame Glock modules (fits 9mm/40cal/10mm/45cal) & Base MAST(TM) Mounting- MAST(TM) design allows each module to be mounted in a vise, screwed to a work bench, or secured in the base. Built Strong. Built to Last- Made from reinforced polymer that is super tough and impact/temperature/chemical resistant. Stainless Steel Base Pins- The MAST(TM) base comes with two stainless steel pins for securing each module. MAST(TM) Base Mounting- MAST(TM) base has four mounting holes & allows the base to be screwed to any flat surface. Magazine Lock- MAST(TM) modules lock securely into the firearm's existing ambi-magazine release. Modular- MAST(TM) modules will be available soon to fit additional firearms. Glock is a federally registered trademark of Glock, Inc. and is one of many trademarks owned by Glock, Inc. or Glock Ges.m.b.H ERGO and Falcon Industries are not affiliated with, nor endorsed by, Glock Inc. or Glock Ges.m.b.H.